28705000051 has 8 divisors (see below), whose sum is σ = 35329230944. Its totient is φ = 22711648320.

The previous prime is 28705000039. The next prime is 28705000057. The reversal of 28705000051 is 15000050782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28705000051 - 2⁵ = 28705000019 is a prime.

It is the 169426-th Hogben number.

It is a junction number, because it is equal to n+sod(n) for n = 28704999983 and 28705000019.

It is not an unprimeable number, because it can be changed into a prime (28705000057) by changing a digit.

It is a nontrivial repunit in base 169425.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157719690 + ... + 157719871.

It is an arithmetic number, because the mean of its divisors is an integer number (4416153868).

Almost surely, 2^28705000051 is an apocalyptic number.

28705000051 is a deficient number, since it is larger than the sum of its proper divisors (6624230893).

28705000051 is a wasteful number, since it uses less digits than its factorization.

28705000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315439581.

The product of its (nonzero) digits is 2800, while the sum is 28.

The spelling of 28705000051 in words is "twenty-eight billion, seven hundred five million, fifty-one", and thus it is an aban number.